CEN ISO/TR 20172:2021

SLOVENSKI STANDARD
01-julij-2021
Nadomešča:
SIST-TP CEN ISO/TR 20172:2013
Varjenje - Razvrščanje materialov v skupine - Evropski materiali (ISO/TR
20172:2021)
Welding - Grouping systems for materials - European materials (ISO/TR 20172:2021)
Schweißen - Werkstoffgruppeneinteilung - Europäische Werkstoffe (ISO/TR 20172:2021)
Soudage - Systèmes de groupement des matériaux - Matériaux européens (ISO/TR
20172:2021)
Ta slovenski standard je istoveten z: CEN ISO/TR 20172:2021
ICS:
25.160.20 Potrošni material pri varjenju Welding consumables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN ISO/TR 20172
TECHNICAL REPORT
RAPPORT TECHNIQUE
May 2021
TECHNISCHER BERICHT
ICS 25.160.20 Supersedes CEN ISO/TR 20172:2009
English Version
Welding - Grouping systems for materials - European
materials (ISO/TR 20172:2021)
Soudage - Systèmes de groupement des matériaux - Schweißen - Werkstoffgruppeneinteilung -
Matériaux européens (ISO/TR 20172:2021) Europäische Werkstoffe (ISO/TR 20172:2021)

This Technical Report was approved by CEN on 20 March 2021. It has been drawn up by the Technical Committee CEN/TC 121.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN ISO/TR 20172:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (CEN ISO/TR 20172:2021) has been prepared by Technical Committee ISO/TC 44
"Welding and allied processes" in collaboration with Technical Committee CEN/TC 121 “Welding and
allied processes” the secretariat of which is held by DIN.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes CEN ISO/TR 20172:2009.
Endorsement notice
The text of ISO/TR 20172:2021 has been approved by CEN as CEN ISO/TR 20172:2021 without any
modification.
TECHNICAL ISO/TR
REPORT 20172
Third edition
2021-04
Welding — Grouping systems for
materials — European materials
Soudage — Systèmes de groupement des matériaux — Matériaux
européens
Reference number
ISO/TR 20172:2021(E)
©
ISO 2021
ISO/TR 20172:2021(E)
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved

ISO/TR 20172:2021(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 International grouping system for European materials . 1
4.1 Types of steel in accordance with the grouping system of ISO/TR 15608:2017, Table 1 . 1
4.2 Types of aluminium and aluminium alloy in accordance with the grouping system
of ISO/TR 15608:2017, Table 2 .22
4.3 Types of copper and copper alloy in accordance with the grouping system of ISO/
TR 15608:2017, Table 3 .24
4.4 Types of cast iron in accordance with the grouping system of ISO/TR 15608:2017,
Table 7 .25
4.5 Types of nickel and nickel alloy in accordance with the grouping system of ISO/
TR 15608:2017, Table 4 .27
Bibliography .29
ISO/TR 20172:2021(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 44, Welding and allied processes,
Subcommittee SC 10, Quality management in the field of welding, in collaboration with the European
Committee for Standardization (CEN) Technical Committee CEN/TC 121, Welding and allied processes,
in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 20172:2009), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— Tables 1 to 5 have been revised;
— new Table 6 has been added for nickel and nickel alloys.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved

ISO/TR 20172:2021(E)
Introduction
This document reflects the situation at the time of publication.
Lists of former designations can be found in the relevant European materials standards.
For the materials not listed in this document, ISO/TR 20173:2018 and ISO/TR 20174:2020 are applicable.
TECHNICAL REPORT ISO/TR 20172:2021(E)
Welding — Grouping systems for materials — European
materials
1 Scope
This document establishes a European grouping system for materials for welding purposes, classified
in accordance with the grouping system of ISO/TR 15608.
It is also applicable for other purposes such as heat treatment, forming and non-destructive testing.
This document covers grouping systems for the following standardized materials:
a) steel;
b) aluminium and its alloys;
c) copper and its alloys;
d) cast irons;
e) nickel and nickel alloys.
For materials that are not assigned to a group in this document, the criteria of ISO/TR 15608 apply.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
4 International grouping system for European materials
4.1 Types of steel in accordance with the grouping system of ISO/TR 15608:2017, Table 1
See Table 1.
Materials grouped according to this document based on chemical composition and mechanical
properties but with specific delivering conditions outside ISO/TR 15608:2017 are qualified separately.
ISO/TR 20172:2021(E)
Table 1 — Steel materials, classification according to the grouping of material
Designation
Group Standard(s)
Name Number
10CrMo5-5 1.7338 5.1 EN 10216-2
10CrMo9-10 1.7380 5.2 EN 10028-2, EN 10216-2, EN 10273
EN 10028-2, EN 10216-2,
11CrMo9-10 1.7383 5.2
EN 10222-2, EN 10273
11MnNi5-3 1.6212 9.1 EN 10028-4, EN 10216-4
EN 10028-4, EN 10216-4,
12Ni14 1.5637 9.2
EN 10222-3
12Ni19 1.5680 9.2 EN 10028-4
EN 10028-2, EN 10216-2,
13CrMo4-5 1.7335 5.1
EN 10222-2, EN 10273
EN 10028-4, EN 10216-4,
13MnNi6-3 1.6217 9.1
EN 10222-3
14MoV6-3 1.7715 6.1 EN 10216-2, EN 10222-2
15MnCrMoNiV5-3 1.6920 4.1 EN 10222-2
15MnMoV4-5 1.5402 1.2 EN 10222-2
15NiCuMoNb5-6-4 1.6368 4.2 EN 10216-2
15NiMn6 1.6228 9.1 EN 10028-4, EN 10222-3
EN 10222-2, EN 10216-2,
16Mo3 1.5415 1.2 EN 10217-2, EN 10217-5, EN 10273,
EN 10028-2
18MnMoNi5-5 1.6308 3.1 EN 10222-2
20CrMoV13-5-5 1.7779 6.3 EN 10216-2
20Mn5 1.1133 1.4 EN 10250-2
20MnB5 1.5353 3.2 EN ISO 683-2, EN ISO 683-3
20MnNb6 1.0471 1.2 EN 10216-2
20NiCrMo2-2 1.6523 3.1 EN 10297-1
20NiCrMoS2-2 1.6526 3.1 EN 10297-1
24CrMo13-6 1.8516 5.2 EN 10085
EN ISO 683-2, EN ISO 683-3,
25CrMo4 1.7218 5.1 EN 10132-2, EN 10216-2,
EN 10297-1
EN ISO 683-2, EN ISO 683-3,
25CrMoS4 1.7213 5.1
EN 10277
25Mn4 1.1177 1.3 EN 10132-2
26CrMo4-2 1.7219 5.1 EN 10216-4
27MnCrB5-2 1.7182 11.1 EN ISO 683-2, EN ISO 683-3
a
28Mn6 1.1170 1.4 EN 10083-2, EN 10250-2
a
30CrMo4 1.7216 5.1 EN 10297-1
30MnB5 1.5531 11.1 EN ISO 683-2, EN ISO 683-3
a
30NiCrMo16-6 1.6747 9.2 EN ISO 683-2, EN ISO 683-3
a
31CrMo12 1.8515 5.2 EN 10085
a
31CrMoV9 1.8519 6.2 EN 10085
a
32CrAlMo7-10 1.8505 5.1 EN 10085
a
The classification of materials is for informational purposes only, as the strength values or limits of chemical
composition specified in this document can be outside the limits of ISO/TR 15608. But these materials have not exactly the
same behaviour during welding as his sub-group material. Welding conditions should be specifically adapted.
2 © ISO 2021 – All rights reserved

ISO/TR 20172:2021(E)
Table 1 (continued)
Designation
Group Standard(s)
Name Number
a
33CrMoV12-9 1.8522 6.2 EN 10085
EN ISO 683-2, EN ISO 683-3,
a
34Cr4 1.7033 5.1
EN 10250-3
a
34CrAlMo5-10 1.8507 5.1 EN 10085
a
34CrAlNi7-10 1.8550 5.1 EN 10085
EN ISO 683-2, EN ISO 683-3,
a
34CrMo4 1.7220 11.2
EN 10297-1
a
34CrMoS4 1.7226 11.2 EN ISO 683-2, EN ISO 683-3
a
34CrNiMo6 1.6582 5.2 EN 10277
a
34CrS4 1.7037 5.1 EN ISO 683-2, EN ISO 683-3
a
35NiCr6 1.5815 9.1 EN ISO 683-2, EN ISO 683-3
a
36NiCrMo16 1.6773 9.2 EN ISO 683-2, EN ISO 683-3
a
37Cr4 1.7
...